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$265+ Cheap flights from Ontario (ONT) to Athens (ATH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ATH
dic. 24 — dic. 311
mié. 12/24
mié. 12/31
1 adult, Economy
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Cheap flight deals from Ontario to Athens

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Athens (ATH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated noviembre 24, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$502
(United Airlines)

One-way from

$265
(oojo)

Popular in

June

Cheapest in

March

Average price

$686
Provider with most accurate pricing for Ontario-Athens Eleftherios V. flight deals.
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Provider most trusted by Cheapflights users for Ontario-Athens Eleftherios V. flights.
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From Ontario to Athens Eleftherios V.
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One-way flight from Ontario to Athens Eleftherios V.
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Highest demand for flights based on searches. 29% potential increase in price ($404 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Ontario to Athens

Cheapest flights from Ontario to Athens
Explore the most affordable flight options available from Ontario to Athens. Find the lowest fares from popular airlines and budget airlines, with prices last updated on noviembre 24, 2025.

This Delta deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/86:00 amONT - ATH
2 stops21h 35mDelta
lun. 3/911:50 amATH - ONT
2 stops32h 45mDelta
Deal found 11/22$611
This United Airlines deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/91:34 pmONT - ATH
2 stops26h 06mUnited Airlines
mié. 3/116:15 amATH - ONT
2 stops25h 10mUnited Airlines
Deal found 11/22$612
This Delta deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/76:00 amONT - ATH
2 stops45h 00mDelta
lun. 3/911:50 amATH - ONT
2 stops32h 45mDelta
Deal found 11/22$617
This United Airlines deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/105:05 amONT - ATH
2 stops33h 20mUnited Airlines
sáb. 3/76:30 amATH - ONT
2 stops26h 27mUnited Airlines
Deal found 11/22$624
This oojo deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/2510:47 amONT - ATH
2 stops22h 43mBritish Airways
mar. 12/27:55 pmATH - ONT
2 stops32h 22mBritish Airways
Deal found 11/22$786
This oojo deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/2510:47 amONT - ATH
2 stops22h 43mBritish Airways
lun. 12/18:10 pmATH - ONT
2 stops33h 31mBritish Airways
Deal found 11/24$823
This United Airlines deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/116:00 amONT - ATH
2 stops33h 40mUnited Airlines
sáb. 3/76:35 amATH - ONT
2 stops26h 22mUnited Airlines
Deal found 11/22$935
This United Airlines deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/131:34 pmONT - ATH
2 stops36h 46mUnited Airlines
lun. 3/96:25 amATH - ONT
2 stops23h 25mUnited Airlines
Deal found 11/22$943
This Delta deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/126:00 amONT - ATH
2 stops33h 15mDelta
mar. 3/101:45 pmATH - ONT
2 stops35h 44mDelta
Deal found 11/22$944
This United Airlines deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/116:00 amONT - ATH
2 stops33h 40mUnited Airlines
jue. 3/512:50 pmATH - ONT
2 stops38h 51mUnited Airlines
Deal found 11/22$946
This Delta deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/126:00 amONT - ATH
2 stops33h 15mDelta
jue. 3/52:35 pmATH - ONT
2 stops35h 27mDelta
Deal found 11/22$962
This United Airlines deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/131:34 pmONT - ATH
2 stops36h 46mUnited Airlines
dom. 3/82:00 pmATH - ONT
2 stops39h 50mUnited Airlines
Deal found 11/22$964

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Athens that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated noviembre 24, 2025.
Use the filters below to find and compare flights from Ontario to Athens that are best for you.

Fly from

Ontario

Fly to

Athens

Route

Depart

Return

Price

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 1/7

1:53 pm-1:40 am

2 stops25h 47m

Athens Eleftherios V.

mié. 1/14

6:15 am-5:43 pm

3 stops21h 28m

$504

OntarioAthens

ONT - ATH

ONTATH

Ontario

jue. 1/22

6:00 am-4:15 pm

2 stops24h 15m

Athens Eleftherios V.

lun. 1/26

6:25 am-10:53 pm

2 stops26h 28m

$510

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 1/14

8:00 am-4:35 pm

2 stops22h 35m

Athens Eleftherios V.

mié. 1/21

12:50 pm-10:53 pm

2 stops20h 03m

$513

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 2/25

1:45 pm-1:40 am

2 stops25h 55m

Athens Eleftherios V.

mié. 3/11

6:15 am-10:25 pm

2 stops25h 10m

$539

OntarioAthens

ONT - ATH

ONTATH

Ontario

sáb. 3/21

10:30 pm-1:00 pm

2 stops29h 30m

Athens Eleftherios V.

vie. 4/3

9:10 am-9:04 pm

1 stop21h 54m

$587

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 4/28

7:00 am-10:55 pm

2 stops29h 55m

Athens Eleftherios V.

mar. 5/12

3:30 pm-11:20 am

2 stops29h 50m

$601

OntarioAthens

ONT - ATH

ONTATH

Ontario

mar. 12/9

5:05 am-1:40 am

2 stops34h 35m

Athens Eleftherios V.

vie. 3/6

6:05 am-8:50 pm

2 stops24h 45m

$612

OntarioAthens

ONT - ATH

ONTATH

Ontario

lun. 4/13

5:02 pm-2:10 am

2 stops23h 08m

Athens Eleftherios V.

jue. 4/30

6:55 am-9:56 pm

2 stops25h 01m

$623

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 1/14

4:45 pm-1:05 am

2 stops22h 20m

Athens Eleftherios V.

mié. 1/28

1:30 pm-10:13 pm

2 stops42h 43m

$649

OntarioAthens

ONT - ATH

ONTATH

Ontario

mié. 3/25

2:47 pm-1:05 am

2 stops25h 18m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 18 results
1
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Compare providers for flights from Ontario to Athens

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Athens in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Athens flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Athens flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Athens flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Athens flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Athens flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Athens

Have a flexible travel schedule? Discover the best time to fly to Athens from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Athens

What is the cheapest month to book a flight from Ontario to Athens?

Currently, August is the cheapest month in which you can book a flight from Ontario to Athens (average of $427). Flying from Ontario to Athens in July is currently the most expensive (average of $601). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to ATH?

Find hourly flight availability from Ontario to Athens. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 24, 2025.

When flying from Ontario to Athens, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 25% versus a flight at noon.

Reviews of airlines servicing Athens

Get insights into the airlines that provide service to Athens. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Athens. Reviews last updated noviembre 24, 2025.
Read reviews from past customers who have flown United Airlines from Ontario to Athens. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,037 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,037 reviews
United Airlines
7.4
Good
9,037 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Ontario to Athens. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Athens?

    Airlines like United Airlines fly from Ontario to Athens in about 33h 40m. The time it takes to get you to your destination can typically vary by up to . Ontario and Athens are separated by a distance of 6879 mi.

  • What is the cheapest airline to fly from Ontario to Athens round-trip?

    According to our current data, United Airlines ($635), offers the cheapest pricing from Ontario to Athens. United Airlines is priced at 36% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Ontario to Athens that include hotel bookings?

    Yes. In addition to deals on Ontario to Athens flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Athens?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Athens.

  • Can I find deals for business class flights from Ontario to Athens?

    Yes. Cheapflights offers flight deals from Ontario to Athens by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Athens?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Athens (average of $427). Flying from Ontario to Athens in July is currently the most expensive (average of $601). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Athens?

Book flights to Athens if you plan to visit one of these locations
Glyfada
Piraeus
Tolo
Galaxidi

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Top airline flying from Ontario to Athens

Discover the top airline that operate flights from Ontario to Athens. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated noviembre 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$635Average$998FlexibilityNo cancel feeOn-time69%

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